Portion of a display panel with a topic icon



FIG. 1 is a front view of a portion of a display panel with a topic icon showing features of a first embodiment of my new design.

The broken lines including the showing of a portion of a display panel of a communications terminal surrounding the illustrated computer icon are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM We claim the ornamental design for a portion of a display panel with a topic icon, as shown and described. 